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bpf: Fix holes in special_kfunc_list if !CONFIG_NET

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If the function is not available its entry has to be replaced with
BTF_ID_UNUSED instead of skipped.
Otherwise the list doesn't work correctly.

Reported-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Closes: https://lore.kernel.org/lkml/CAADnVQJQpVziHzrPCCpGE5=8uzw2OkxP8gqe1FkJ6_XVVyVbNw@mail.gmail.com/
Fixes: 00a5acdbf398 ("bpf: Fix configuration-dependent BTF function references")
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20241219-bpf-fix-special_kfunc_list-v1-1-d9d50dd61505@weissschuh.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Thomas Weißschuh 2024-12-19 22:41:41 +01:00 committed by Alexei Starovoitov
parent 34ea973dd4
commit 4a24035964
1 changed files with 3 additions and 0 deletions
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3
kernel/bpf/verifier.c
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@ -11739,6 +11739,9 @@ BTF_ID(func, bpf_rbtree_first)
#ifdef CONFIG_NET
BTF_ID(func, bpf_dynptr_from_skb)
BTF_ID(func, bpf_dynptr_from_xdp)
#else
BTF_ID_UNUSED
BTF_ID_UNUSED
#endif
BTF_ID(func, bpf_dynptr_slice)
BTF_ID(func, bpf_dynptr_slice_rdwr)